By reversing the neck and middle pickup lead hookup wires on the lever switch (3 or 5 way) you will be able to get the following pickup combinations.

It is best to use 250k volume and tone controls. In the drawing below the wires from the tone are connected to the treble and middle pickup. The neck pickup has no tone control with this wiring. Make sure all the pots and switch are properly grounded. You will get only three pickup combinations when using a 3 way lever switch and the drawing below uses a 5 way lever to get five pickup combinations. Have fun.

Note: the neck and middle wires are reversed on the switch.

Below are the positions using a 5 Way lever switch.

Position 1-Bridge pickup only (lever switch towards bridge)

Position 2-Bridge & Neck pickup

Position 3-Neck pickup only (lever switch in middle position) No tone control

Position 4-Neck & Middle pickup

Position 5-Middle pickup only (lever switch towards neck)